Abels and Mushaben (2012) argue that there is a double democratic deficit in the EU regarding gender: women are underrepresented within the EU institutions and gender awareness is lacking in EU policymaking. This article contributes to that scholarship with its specific focus on the climate domain. EU is an important constructor of the international climate regime and the Union is committed to gender mainstream all its policies and processes. Furthermore there are documented gender differences in Europe regarding behavior and views on climate change. (Räty and Carlsson-Kanyama 2010, Goldsmith et al. 2013). This article investigates the relevancy of the double democratic deficit for EU´s climate policymaking. We map the representation of female and male experts at the Commission´s climate units and search for gender recognition in EU´s climate documents. There we discover silence regarding gender, confirmed through interviews with policy-makers. Using feminist institutionalism we conclude that existing gender power relations within the Commission affect the explored climate units, which reproduce masculine institutional practices.